While this is not the kind of help you are looking for, I would think a more practical dream would be an old time rimmed cartridge such as 38/55 in the 1885. The modern 38/55 rifles can be loaded to approximate the 358win or equal 375win version of the same. I believe there are several makers of single shots who will make this for you or offer it as a std model. If you are thinking moose, the 38/55 seems a good practical choice for the big bore minded hunter.
Or,... a 358win could be made up in a bolt action, which is more appropriate match up to that cartridge design. You can easily make a light woods rifle with a bolt action and a slightly shorter barrel, say 20 to 22 instead of 24. I know, not as classy as a single shot.
That is how my preferences run. Then I know, building your own is all about making it your way, not mine..
Good luck and hopefully you enjoy the process where ever it leads.
Last edited by fourbore; 08/13/17.
